Thermal power plant covers several different types, such as full condensing, single-extraction (steam extraction with one certain temperature/pressure), double-extraction (steam extraction with two kinds of temperature/pressure), back pressure (make use of the exhaust steam) and combined type (extraction and back pressure), to meet the different kinds of requirement of the owner. Usually the power plant of extraction type and back pressure type be named as "Cogen plant", because they produce not only electricity but also steam (external supply). Cogen plant and full condensing power plant are both widely used, mainly for electricity supply to state grid as well as electricity / steam supply to some certain enterprises.

Theoretically, cogen plant has a higher overall efficiency than full condensing power plant because of the reuse of extracted steam and/or exhaust steam. It is suitable for the users with requirement of both electricity and steam, such as food / oil / pharmaceutical processing plant, ethanol plants, sugar mill, paper mill, chemical plant, wood processing plant, etc. While most of full condensing power plants built for electricity supply to state grid, which is near to a coal mine or at a place with convenient transport of coal.

Power plants of small and medium size normally refer to the following four parameters to choose BTG and systematic equipment and material. We will select for our customers the most suitable one(s) considering the scale, local conditions, operating level of staff, input-output ratio and such factors.